Compliance Guide
UK SRS compliance: what's required and how to prepare
UK SRS is voluntary today, so there is currently no mandatory compliance obligation. Compliance becomes binding through the FCA: under CP26/5, in-scope listed companies would be required to report against UK SRS S2 for accounting periods beginning on or after 1 January 2027, with Scope 3 and wider sustainability reporting on a comply-or-explain basis.
Who must comply, and when
The FCA's proposal covers around 500 listed issuers across five UK Listing Rule categories 257. Mandatory UK SRS S2 climate reporting is proposed from 1 January 2027; Scope 3 emissions follow on comply-or-explain after a one-year relief (effectively 2028); and wider UK SRS S1 disclosures follow after a two-year relief (effectively 2029) 68.
Large private companies are not yet in scope, but the Government is expected to consult on them through the Modernising Corporate Reporting programme 24. This would bring UK SRS requirements into the Companies Act for large private companies, though timing and scope remain to be determined 24.
What compliance actually involves
UK SRS compliance means reporting across the four pillars that structure both standards — governance, strategy, risk management, and metrics and targets 4. For climate (UK SRS S2) that includes greenhouse-gas emissions across Scopes 1, 2 and 3, scenario analysis, and disclosure of any transition plan 420.
Disclosures must connect explicitly to the financial statements and be published at the same time, for the same period 28. They use financial (enterprise-value) materiality — what affects the company — not double materiality 9. This differs from EU requirements which use both impact and financial materiality 9.
Comply or explain — what it means here
For the elements treated as comply-or-explain (Scope 3 and UK SRS S1), a company that does not disclose must instead explain: identify the specific paragraphs of UK SRS it has not met, give its reasons, and set out the steps and timeframe to make those disclosures in future 6.
This is the same "explain" discipline as the existing TCFD-aligned rules 22. The FCA expects companies to work toward full disclosure over time, with comply-or-explain providing transition relief rather than permanent exemption 6.
Assurance and enforcement
The FCA does not propose mandatory assurance, but in-scope companies must state whether they obtained third-party assurance over their disclosures 21. The FRC is expected to launch its interim sustainability-assurance practitioner register around mid-2026 to build market capability 21.
Compliance monitoring follows the FCA's existing approach for listed companies: supervisory reviews, thematic work, and enforcement action where standards are not met 22. The FCA has signaled it will take time for market practices to develop before intensive enforcement 6.
How to prepare
Run a gap analysis against your current TCFD-aligned reporting; build the data systems for Scope 3 and the wider S1 topics, since these have the longest lead time; establish board-level governance over sustainability data; and consider voluntary early adoption in 2026 to surface gaps before the 2027 rules bite 61.
For implementation checklists and tooling, see srsreport.co.uk; for the comply-or-explain explain-route mechanics, see sustainabilityreportingstandards.co.uk. Both sites provide specialized guidance that complements this umbrella overview 6.
Is UK SRS compliance mandatory?
Who has to comply with UK SRS?
What does comply-or-explain mean for UK SRS?
Is assurance required for UK SRS compliance?
How do I prepare for UK SRS compliance?
Related guides & references
Who Must Comply with UK SRS
Detailed breakdown of which companies fall under FCA proposals and future extensions
FCA SDR and Anti-Greenwashing Rules
How FCA investment product rules differ from UK SRS corporate reporting compliance
UK SRS S2: Climate-Related Disclosures
What UK SRS S2 climate compliance involves — the four pillars and disclosure requirements
UK Sustainability Regulation Timeline
When UK SRS compliance deadlines fall within the broader regulatory timeline
UK SRS Compliance Implementation Guide (srsreport.co.uk)
Step-by-step compliance checklists and practical implementation guidance
Sustainability Reporting Standards Compliance (sustainabilityreportingstandards.co.uk)
Detailed comply-or-explain mechanics and compliance obligation guidance